Economics is the study of how societies use scarce resources to produce valuable goods and services and distribute them among different individuals. If we think about the definitions, we find two key ideas that run through all of economics:

"The camera sees what the eye cannot."

投资技术就是投资乳制品的未来。

"Books are mirrors: you only see in them what you already have inside you."

释义：天上的繁花枝枝相连，人间的树木棵棵相接。不在乎经历了多少个春天和秋天，也忘却了早晨和傍晚。不在乎时光的流逝，有一种超脱于时间之外的自在感。